THE MONTHLY BULLETIN 



CALIFORNIA STATE COMMISSION OF HORTICULTURE. 



DEVOTED TO HORTICULTURE IN ITS BROADEST SENSE, WITH SPECIAL 



REFERENCE TO PLANT DISEASES, INSECT PESTS, AND 



THEIR CONTROL. 



Sent free to all citizens of the State of California. Offered in exchange for bulletins 

 of the Federal Government and experiment stations, entomological and mycological 

 journals, agricultural and horticultural papers, botanical and other publications of a 

 similar nature. 



A. J. Cook, State Commissioner of Horticulture Censor 



B. J. VosLER, Secretary State Commission of Horticulture Editor 



ASSOCIATE EDITORS. 



Geo. p. Weldon Chief Deputy Commissioner 



Harrt S. Smith Superintendent State Insectary 



Frederick Maskew Chief Deputy Quarantine Officer 



Entered as second class matter December 29, 1911, at the post office at Sacramento, 

 California, under the act of July 16, 1894. 



Mealy Bug Bulletin. — Mr. Curtis P. Clausen of the University of 

 California is the author of a valuable bulletin. No. 258, subject: "Mealy 

 Bugs of Citrus Trees." This bulletin will be gladly received by citrus 

 growers. It is illustrated and discusses the subject with the same 

 thoroughness that characterizes Professor Quayle's bulletins which treat 

 of the several destructive scale insects which are such serious pests in 

 our State. Besides the two well-known species, Pseiidococcus longi- 

 spinus and P. citri, and the le.sser well-known, P. hakeri, a very full 

 consideration is given to the new species which has been such a trouble 

 maker in a small area of western San Bernardino County. Mr. Clausen 

 with other students of the Coccids recognizes this as being quite dis- 

 tinct from P. hakeri and describes it as P. citrophilus. It is supposed 

 that this species came into this State on ornamentals, so this is another 

 of the repeated proofs that our very efficient quarantine rastrictions 

 including the parcel post regulation were adopted none too soon. Mr. 

 Clausen finds that fumigation is not satisfactory against these pests 

 and that most sprays are lacking in efficienc5^ Even the spray which 

 Mr. Essig discovered to be so valuable at Santa Paula he describes as 

 not entirely satisfactory. He recommends spraying the trees with 

 water under a high pressure as one of the best methods to control this 

 and other mealy bugs. — A. J. C. 



The Silo — A Valuable Bulletin.— IMore and more will alfalfa become 

 important to the orchardist. Its great productivity, its manurial value, 

 and, if the grower has abundant water for irrigation purposes, its value 

 as a cheap nitrogen trap when grown in the orchard will make it more 

 and more attractive to the orchardist. 



The State University has just issued a valuable circular. No. 138, by 

 Prof. F. W. Woll on the "Silo." This publication is timely and 

 deserves a wide reading. 



The writer is reminded of an interesting episode which occurred 

 about twenty years ago at Santa Ana, Orange County. A farmers' 

 institute was being held at this place, and in the early morning we were 

 driven out to inspect the country and crops. We were greatly pleased 

 Avith the evident fertility of the soil, as also the great crops of corn and 

 alfalfa. Upon tlie o])ening of the session that day the writer suggested 



